120 x 2 =
233+22-x=2018 - (-120+x :2)= 9102 :1,5+(-120)
120/1,2x + 2/3 = 120/x
Tìm x
\(\frac{120}{1,2x}+\frac{2}{3}=\frac{120}{x}\Rightarrow\frac{100}{x}+\frac{2}{3}=\frac{120}{x}\)
\(\Rightarrow\frac{20}{x}=\frac{2}{3}\Rightarrow x=\frac{20.3}{2}=30\)
120/1.2x+2/3=120/x
100/x-120/x=-2/3
-20/x=-2/3
x=30
\(\frac{120}{1.2x}\)\(+\frac{2}{3}\)\(=\frac{120}{x}\)\(\Rightarrow\frac{100}{x}\)\(+\frac{2}{3}\)\(=\frac{120}{x}\)
\(\Rightarrow\frac{20}{x}\)\(=\frac{2}{3}\)\(\Rightarrow x=\frac{20.3}{2}\)\(=30\)
@Trungmh
Tìm x, biết:
a) x - 120: 30 = 40;
b) (x + 120) : 20 = 8;
c) (x + 5). 3 = 300;
d) x.2 + 21 : 3= 27
a) x = 44.
b) x = 40.
c) x = 95.
d) x = 10.
a) x - 120: 30 = 40
x -40 =40
x =40+40
x =80
b) (x + 120) : 20 = 8
(x+ 120) = 8x20
x+120 =160
x = 160-120
x = 40
c) (x + 5). 3 = 300
x+5=300:3
x+5=100
x=100-5
x=95
d) x.2 + 21 : 3= 27
x.2 +7=27
x.2 = 27-7
x.2= 20
x=20:2
x=10
Rút gọn các biểu thức sau:
a, \(\sqrt{\left(120-11\right)^2}+\sqrt{\left(10-\sqrt{120}\right)^2}\)
b, \(\sqrt{x+2+2\sqrt{x+1}-\sqrt{x+2+2\sqrt{x+1}}}\) ( với đk x \(\ge\) -1 )
Giúp em với !!
\(\sqrt{\left(120-11\right)^2}+\sqrt{\left(10-\sqrt{120}\right)^2}\)
\(=120-11+10+\sqrt{120}\)
\(=\sqrt{120}\left(\sqrt{120}+1\right)-1\)
\(a,=\left(120-11\right)+\left|10-\sqrt{120}\right|=109+\sqrt{120}-10=99+2\sqrt{30}\\ b,=\sqrt{\left(\sqrt{x+1}+1\right)^2-\left(\sqrt{x+1}+1\right)^2}=\sqrt{0}=0\)
tim so nguyen x
(3x - 25) - (x - 9) = 2 - x
2x + (-73 - 120) - (20 - 120) = 5
\(\left(3x-25\right)-\left(x-9\right)=2-x\Leftrightarrow3x-25-x+9=2-x\Leftrightarrow2x-16-2+x=0\Leftrightarrow3x-18=0\)
\(\Leftrightarrow3x=18\Leftrightarrow x=6\)
\(2x+\left(-73-120\right)-\left(20-120\right)=5\Leftrightarrow2x-73-120-20+120=5\Leftrightarrow2x-93=5\)
\(\Leftrightarrow2x=98\Leftrightarrow x=49\)
๛๖ۣۜTɦủү❄๖ۣۜAɾĭαηηεツ Trình bày bài cho dễ nhìn nha -.-
\(\left(3x-25\right)-\left(x-9\right)=2-x\)
\(3x-25-x+9=2-x\)
\(\left(3x-x\right)-25+9=2-x\)
\(2x-16=2-x\)
\(2x+x=2+16\)
\(3x=18\)
\(x=6\)
\(2x+\left(-73-120\right)-\left(20-120\right)=5\)
\(2x+\left(-73\right)-120-20+120=5\)
\(2x+\left[\left(-73\right)-20\right]+\left(120-120\right)=5\)
\(2x+\left(-93\right)+0=5\)
\(2x+\left(-93\right)=5\)
\(2x=98\)
\(x=49\)
GIÚP MIK VỚI : A) 120 X 2 =120 X4 = 120 X 4 B) TÌM MỘT SỐ, BIẾT RẰNG NẾU LẤY SỐ ĐÓ NHÂN VỚI 4 RỒI CỘNG VỚI 1034 THÌ ĐƯỢC 2270
A, 120 x 2 = 120 x 4
120 x 2 = 240
B, số đó là :
(2270 - 1034) : 4 = 309
Tim y
1} (y - 25 ): 4 - 120 = 0
2} 120 - (x + 25) x 4 = 0
1>y-25=120.4
y-25=480
y=505
2>4 nhân (x+25)=120
x+25=30
x=5
1) ( y-25):4 - 120 = 0 2) 120 - ( x+25 )x4 = 0
( y-25 ):4 = 0+120 (x+25) x4 =120-0
( y-25):4 =120 (x+25) x4 =120
( y-25)=120x4 (x+25)=120:4
y-25=480 x+25=30
y=480+25 x=30-25
y=505 x=5
k mk nha
1}(y-25):4-120=0
(y-25):4=120
y-25=120 x 4
y-25=480
y=505
2}120-(x+25)x4=0
(x-25)x4=120
x-25=120:4
x-25=30
x=5
Ủng hộ mk nh các bạn ai k mk mk k lại
Tính
120 x 999 + 120
2 x 4 x 0,8 x 5 x 2,5 x125
\(\frac{120\times999+120}{2\times4\times0,8\times5\times2,5\times125}\)
\(=\frac{120\times1000}{\left(125\times0,8\right)\left(4\times2,5\right)\left(2\times5\right)}\)
\(=\frac{120000}{100\times10\times10}\)
\(=\frac{120000}{10000}\)
\(=\frac{12}{1}=12\)
120 x 2 x 1 x 2 = ?
120 x 2 x 1 x 2 = 480
Đc rùi Việt Anh k mk đi rùi mk sẽ k lại bn
120 x 2 x 1 x 2
= 240 x 1 x 2
= 240 x 2
= 480
120 - 2 x X + 5 x X = 360
120-2.x+5.x=360
=>3x+120=360
=>3x=240
=>x=80
-Chú thích dấu x=.